ACCOUNTING POLICIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2006	Dec. 31, 2015	Dec. 28, 2006
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue recognition, percentage of revenue subject to guidance in ASC 605-15 and 605-20, minimum	80.00%
Revenue recognition, percentage of revenue subject to guidance in ASC 605-15 and 605-20, maximum	90.00%
Sell and lease back of real estate properties		$ 10,250
Amount of the sale price in excess of book value	$ 1,906		$ 2,140	$ 4,242
Lease term of property		18 years